package com.zzyl.nursing.service.impl;

import cn.hutool.core.util.ObjectUtil;
import cn.hutool.http.HttpUtil;
import cn.hutool.json.JSONObject;
import cn.hutool.json.JSONUtil;
import com.zzyl.common.exception.base.BaseException;
import com.zzyl.nursing.service.WechatService;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;

import java.util.HashMap;
import java.util.Map;

@Service
public class WechatServiceImpl implements WechatService {

    // 登录
    private static final String REQUEST_URL = "https://api.weixin.qq.com/sns/jscode2session?grant_type=authorization_code";

    // 获取token
    private static final String TOKEN_URL = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential";

    // 获取手机号
    private static final String PHONE_REQUEST_URL = "https://api.weixin.qq.com/wxa/business/getuserphonenumber?access_token=";

    @Value("${wechat.appId}")
    private String appId;

    @Value("${wechat.appSecret}")
    private String appSecret;
    @Override
    public String getOpenId(String code) {
        Map<String, Object> params = new HashMap<>();
        params.put("appId", appId);
        params.put("secret", appSecret);
        params.put("js_code", code);

        //发送请求，获取appId
        String result = HttpUtil.get(REQUEST_URL, params);

        //解析结果
        JSONObject resultObj = JSONUtil.parseObj(result);
        Integer errcode = resultObj.getInt("errcode");
        // 判断接口响应是否出错
        if (errcode != null) {
            throw new BaseException(resultObj.getStr("errmsg"));
        }
        return resultObj.getStr("openid");
    }

    @Override
    public String getPhone(String detailCode) {
        //调用getToken()
        String token = getToken();
        //通过token获取手机号
        Map<String, Object> params = new HashMap<>();
        params.put("code", detailCode);
        String result = HttpUtil.post(PHONE_REQUEST_URL + token, JSONUtil.toJsonStr(params));
        JSONObject resultObj = JSONUtil.parseObj(result);

        if (resultObj.getInt("errcode") != 0) {
            throw new BaseException(resultObj.getStr("errmsg"));
        }
        // 返回手机号
        return resultObj.getJSONObject("phone_info").getStr("phoneNumber");

    }

    /**
     * 获取token
     * @return
     */
    private String getToken() {
        Map<String, Object> params = new HashMap<>();
        params.put("appid", appId);
        params.put("secret", appSecret);

        //调用微信获取token
        String result = HttpUtil.get(TOKEN_URL, params);
        //解析结果
        JSONObject resultObj = JSONUtil.parseObj(result);
        if (ObjectUtil.isNotEmpty(resultObj.getInt("errcode"))) {
            throw new BaseException(resultObj.getStr("errmsg"));
        }
        return resultObj.getStr("access_token");
    }
}
